5
TFT TV Service Manual
11.1. TEA6415C
11.1.1. General
Description
The main function of the IC is to switch 8 video input sources on 6 outputs. Each output can be
switched on only one of each input. On each input an alignment of the lowest level of the signal is made
(bottom of synch. top for CVBS or black level for RGB signals). Each nominal gain between any input
and output is 6.5dB. For D2MAC or Chroma signal the alignment is switched off by forcing, with an
external resistor bridge, 5 V
DC
on the input. Each input can be used as a normal input or as a MAC or
Chroma input (with external resistor bridge). All the switching possibilities are changed through the
BUS. Driving 75
load needs an external transistor. It is possible to have the same input connected to
several outputs. The starting configuration upon power on (power supply: 0 to 10V) is undetermined. In
this case, 6 words of 16 bits are necessary to determine one configuration. In other case, 1 word of 16
bits is necessary to determine one configuration.
11.1.2. Features
• 20MHz Bandwidth
• Cascadable with another TEA6415C (Internal address can be changed by pin 7 voltage)
• 8 Inputs (CVBS, RGB, MAC, CHROMA,...)
• 6 Outputs
• Possibility of MAC or chroma signal for each input by switching-off the clamp with an external resistor
bridge
• Bus controlled
• 6.5dB gain between any input and output
• 55dB crosstalk at 5mHz
• Fully ESD protected
11.1.3. Pinning
1.
Input
:
Max
: 2Vpp, Input Current: 1mA, Max : 3mA
2.
Data
:
Low level
: -0.3V Max: 1.5V,
High level
: 3.0V Max
: Vcc+0.5V
3.
Input
:
Max
: 2Vpp, Input Current: 1mA,
Max
: 3mA
4.
Clock
:
Low level
: -0.3V Max: 1.5V,
High level
: 3.0V Max
: Vcc+0.5V
5.
Input
:
Max
: 2Vpp, Input Current: 1mA, Max : 3mA
6.
Input
:
Max
: 2Vpp, Input Current: 1mA, Max : 3mA
7. Prog
8.
Input
:
Max
: 2Vpp, Input Current: 1mA, Max: 3mA
9. Vcc
: 12V
10.
Input
:
Max
: 2Vpp, Input Current: 1mA, Max : 3mA
11.
Input
:
Max
: 2Vpp, Input Current: 1mA, Max : 3mA
12. Ground
13.
Output
:
5.5Vpp,
Min : 4.5Vpp
14.
Output
:
5.5Vpp,
Min : 4.5Vpp
15.
Output
:
5.5Vpp,
Min : 4.5Vpp
16.
Output
:
5.5Vpp,
Min : 4.5Vpp
17.
Output
:
5.5Vpp,
Min : 4.5Vpp
18.
Output
: 5.5Vpp,
Min
:
4.5Vpp
19. Ground
20.
Input
:
Max : 2Vpp, Input Current
: 1mA, Max
: 3mA
Содержание 32LD8600
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